Summer is in full swing, for me anyway, and there are very few recipes that I am willing to crank up my oven and sweat it out just for something sweet. These keto fat bomb lemon squares are one of those recipes. Not just because lemon squares (aka lemon bars) are a beloved dessert staple that has transcended time and potlucks everywhere, but because these are Toasted Coconut Lemon Squares and everyone knows that the sweet and salty crunch of coconut makes everything better.
Traditional lemon squares are gooey and tangy and guaranteed to make a mess of your fingers. This spin on an old classic combines the bite of a lemon with a dairy free, egg based, custard style filling which is topped with crispy toasted coconut chips and packed with protein. The creamier, heavy filling keeps the lemon coconut crust from getting too soggy and flimsy. Win-win!
Slice these squares into 9 servings for a calorie dense breakfast, or into 12 bars for a lighter keto treat! If you don’t mind using real milk, the amounts are the same but remember that the fat and calories will change by using whole fat milk. You can use unsweetened toasted coconut, but I highly recommend toasted coconut chips. They are readily available at most grocery stores. The chips have zero sugar added and are crispier than toasting your own coconut!
Yields 12 servings of Toasted Coconut Lemon Squares
The Preparation
Crust:
- 1 cup almond flour
- 1/4 cup coconut flour
- 1/4 cup erythritol
- 1/2 tablespoon lemon zest, to taste
- 3 tablespoons butter, softened
Filling:
- 1 tablespoon butter, softened
- 3/4 cup erythritol
- 1/2 cup unsweetened almond milk
- 1 cup lemon juice
- 1/2 tablespoon lemon zest, to taste
- 5 large egg, beaten
Topping:
- 3/4 cup unsweetened toasted coconut flakes
- 2 tablespoons almond flour
- 1/2 tablespoon butter
The Execution
Crust
1. Heat oven to 350°F and prepare a 9×9 inch pan with non-stick cooking spray. In a large mixing bowl combine the almond flour, coconut flour, sweetener, and lemon zest then stir until all ingredients are uniformly mixed.
2. Cut the softened butter into the flour mix with a fork. You may want to dig in with your hands to thoroughly incorporate the butter into the flour.

Filling
1. Bring a saucepan to medium heat and add butter, erythritol, lemon zest, and milk. Stir until the butter and sugar has been completely dissolved.
2. Pour in lemon juice. Be sure to use a strainer if you are using freshly squeezed juice!
3. Slowly whisk in the eggs and stir continuously over medium low heat until the mixture begins to thicken. This should talk about 5 to 10 minutes.
4. Transfer the lemon filling into your crust and return to the oven for 15 minutes. Prepare the topping.
Topping
1. In a small food processor or blender pulse the toasted coconut, almond flour, and butter until you have a grainy mixture.
2. Sprinkle topping on your lemon squares and return to the hot oven to crisp the top for approximately 5 minutes, or 1 minute under a hot broiler. Be careful not to burn the crumble!
3. Let cool before serving.
This makes a total of 12 servings of Toasted Coconut Lemon Squares. Each serving comes out to be 179 calories, 14.6g fats, 4.6g net carbs, and 5.7g protein.
| NUTRITION | CALORIES | FAT | CARBS | FIBER | NET CARBS | PROTEIN |
| 1 cup almond flour | 648 | 56 | 24.6 | 14.6 | 10.1 | 23.5 |
| 1/4 cup coconut flour | 80 | 4.7 | 13.3 | 9.3 | 4 | 4 |
| 1/4 cup erythritol | 10 | 0 | 0 | 0 | 0 | 0 |
| 1/2 tablespoon lemon zest | 1 | 0 | 0.5 | 0.3 | 0.2 | 0.1 |
| 3 tablespoon butter | 305 | 34.5 | 0 | 0 | 0 | 0.4 |
| 1 tablespoon butter | 102 | 11.5 | 0 | 0 | 0 | 0.1 |
| 3/4 cup erythritol | 29 | 0 | 0 | 0 | 0 | 0 |
| 1/2 cup unsweetened almond milk | 14 | 1.3 | 0.6 | 0.4 | 0.2 | 0.6 |
| 1 cup lemon juice | 41 | 0.2 | 13.7 | 1.7 | 12 | 1.2 |
| 1/2 tablespoon lemon zest | 1 | 0 | 0.5 | 0.3 | 0.2 | 0.1 |
| 5 large egg | 393 | 26.2 | 2 | 0 | 2 | 34.5 |
| 3/4 cup unsweetened toasted coconut flakes | 425 | 34 | 21.3 | 12.8 | 8.5 | 4.3 |
| 2 tablespoon almond flour | 81 | 7 | 3.1 | 1.8 | 1.3 | 2.9 |
| 1/2 tablespoon butter | 51 | 5.8 | 0 | 0 | 0 | 0.1 |
| Totals | 2183 | 181.2 | 79.5 | 41.2 | 38.4 | 71.7 |
| Per Serving (/12) | 182 | 15.1 | 6.6 | 3.4 | 3.2 | 6 |

Toasted Coconut Lemon Squares
Ingredients
Crust:
- 1 cup almond flour
- ¼ cup coconut flour
- ¼ cup erythritol
- ½ tablespoon lemon zest to taste
- 3 tablespoon butter softened
Filling:
- 1 tablespoon butter softened
- ¾ cup erythritol
- ½ cup unsweetened almond milk
- 1 cup lemon juice
- ½ tablespoon lemon zest to taste
- 5 large egg beaten
Topping:
- ¾ cup unsweetened toasted coconut flakes
- 2 tablespoon almond flour
- ½ tablespoon butter
Instructions
- Heat oven to 350F and prepare a 9×9 inch pan with non-stick cooking spray. In a large mixing bowl combine the almond flour, coconut flour, sweetener, and lemon zest, then stir until all ingredients are uniformly mixed.
- Cut the softened butter into the flour mix with a fork. You may want to dig in with your hands to thoroughly incorporate the butter into the flour.
- Press the dough into the prepared baking dish and bake for 15 minutes or until crust is golden. Set aside while you prepare the filling.
- Bring a saucepan to medium heat and add butter, erythritol, and milk. Stir until the butter and sugar have completely dissolved.
- Pour in lemon juice. Be sure to use a strainer if you are using freshly squeezed juice!
- Slowly whisk in the eggs and stir continuously over medium-low heat until the mixture begins to thicken. This should talk about 5 to 10 minutes.
- Transfer the lemon filling to your crust and return to the oven for 15 minutes. Prepare the topping.
- In a small food processor or blender pulse the toasted coconut, almond flour, and butter until you have a grainy mixture.
- Sprinkle topping on your lemon squares and return to the hot oven to crisp the top for approximately 5 minutes, or 1 minute under a hot broiler. Be careful not to burn the crumble!
- Let cool before serving.




















The flavors are these were amazing but even though my custard was thick it still hasn’t set perfectly like in your photos. Anything to add to this to firm up the custard for next time?
You might need to cook it a little longer. You can also try adding some additional egg yolks.
When you say erythritol is it a blend or just plain erythritol on its own?
Just plain erythritol. 🙂
Do you think pyure would work?
Yes! You might want to use half then add more if needed…most of their packaging claims to be 2x times as sweet as sugar. I don’t find this to be true, but some people seem to be more sensitive to it than me. 🙂
Did you use powdered erithrytol or granular? Thanks!
It’s granulated in the recipe but powdered might work best if you have the extra time to grind it or have powdered on hand.
Thank you!
One more question, could I use heavy whipping cream instead of almond milk?
Sure! That should work great.
I just made these and they are amazing!! I’m not a fan of the aftertaste of erythritol, but is seems like the lemon was strong enough to cover that. We will definitely be making these again!!
Thank you Pam!
Too lemony! I will make again but use only 1/2 cup of lemon juice. Also, I used Silk milk instead of almond milk and it turned out good.
Oh no! I hope you like them better with less lemon. 🙂
It’s really good! Just more tart than I expected. With less lemon juice it turned out too eggy, so I will keep experimenting on my end 🙂
you are right use 3/4
has anyone tried replacing the erythritol with something like stevia in the raw? I cannot have erythritol due to the way it is created and would love to try this dessert
I used canned unsweetened coconut milk for a bigger fat bomb serving as I do keto. It turned out great. Also used liquid stevia. Three full droppers and hit the correct sweetness to sour ratio. Do not do if you dislike stevia after taste.
Just tried to make this – I think our filling may have been too thin when we put it in the oven so waiting to see how it turns out. One question: when do you put the 1/2 Tbsp of lemon zest into the filling?
Hi, I see that this is missing and will fix it. I would add this in step one.
Would these freeze?? Or how long will they hold in the fridge?
I think they should freeze. In the fridge it should last for 3-4 days, if not a little longer.
I only have COCONUT flour, can I modify the recipe?
You would probably have to reduce the amount of flour or add some type of liquid to it. Coconut flour is much more absorptive than almond flour. You can see more here: https://www.ruled.me/keto-f…
Made this as my first foray into low carb desserts. Worked out really well – no aftertaste (used Swerve and I only added 4 extra large eggs instead of 5 because they were huge and had double yolks.. Added the full amount of lemon, its tart but still delicious. Chilled it thoroughly before slicing.
You’re welcome 🙂 Let us know how it turns out when you try it again!
I just made these with a coconut flour pie crust and added sliced almonds. This is soooo good
Sounds delicious! Thanks for the feedback.
I did a 9×13 so my bars are a little thinner